target/hexagon/gdbstub.c

   1 /*
   2  *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "qemu/osdep.h"
  19 #include "gdbstub/helpers.h"
  20 #include "cpu.h"
  21 #include "internal.h"
  22
  23 int hexagon_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
  24 {
  25     HexagonCPU *cpu = HEXAGON_CPU(cs);
  26     CPUHexagonState *env = &cpu->env;
  27
  28     if (n == HEX_REG_P3_0_ALIASED) {
  29         uint32_t p3_0 = 0;
  30         for (int i = 0; i < NUM_PREGS; i++) {
  31             p3_0 = deposit32(p3_0, i * 8, 8, env->pred[i]);
  32         }
  33         return gdb_get_regl(mem_buf, p3_0);
  34     }
  35
  36     if (n < TOTAL_PER_THREAD_REGS) {
  37         return gdb_get_regl(mem_buf, env->gpr[n]);
  38     }
  39
  40     g_assert_not_reached();
  41 }
  42
  43 int hexagon_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
  44 {
  45     HexagonCPU *cpu = HEXAGON_CPU(cs);
  46     CPUHexagonState *env = &cpu->env;
  47
  48     if (n == HEX_REG_P3_0_ALIASED) {
  49         uint32_t p3_0 = ldtul_p(mem_buf);
  50         for (int i = 0; i < NUM_PREGS; i++) {
  51             env->pred[i] = extract32(p3_0, i * 8, 8);
  52         }
  53         return sizeof(target_ulong);
  54     }
  55
  56     if (n < TOTAL_PER_THREAD_REGS) {
  57         env->gpr[n] = ldtul_p(mem_buf);
  58         return sizeof(target_ulong);
  59     }
  60
  61     g_assert_not_reached();
  62 }
  63
  64 static int gdb_get_vreg(CPUHexagonState *env, GByteArray *mem_buf, int n)
  65 {
  66     int total = 0;
  67     int i;
  68     for (i = 0; i < ARRAY_SIZE(env->VRegs[n].uw); i++) {
  69         total += gdb_get_regl(mem_buf, env->VRegs[n].uw[i]);
  70     }
  71     return total;
  72 }
  73
  74 static int gdb_get_qreg(CPUHexagonState *env, GByteArray *mem_buf, int n)
  75 {
  76     int total = 0;
  77     int i;
  78     for (i = 0; i < ARRAY_SIZE(env->QRegs[n].uw); i++) {
  79         total += gdb_get_regl(mem_buf, env->QRegs[n].uw[i]);
  80     }
  81     return total;
  82 }
  83
  84 int hexagon_hvx_gdb_read_register(CPUHexagonState *env, GByteArray *mem_buf, int n)
  85 {
  86     if (n < NUM_VREGS) {
  87         return gdb_get_vreg(env, mem_buf, n);
  88     }
  89     n -= NUM_VREGS;
  90
  91     if (n < NUM_QREGS) {
  92         return gdb_get_qreg(env, mem_buf, n);
  93     }
  94
  95     g_assert_not_reached();
  96 }
  97
  98 static int gdb_put_vreg(CPUHexagonState *env, uint8_t *mem_buf, int n)
  99 {
 100     int i;
 101     for (i = 0; i < ARRAY_SIZE(env->VRegs[n].uw); i++) {
 102         env->VRegs[n].uw[i] = ldtul_p(mem_buf);
 103         mem_buf += 4;
 104     }
 105     return MAX_VEC_SIZE_BYTES;
 106 }
 107
 108 static int gdb_put_qreg(CPUHexagonState *env, uint8_t *mem_buf, int n)
 109 {
 110     int i;
 111     for (i = 0; i < ARRAY_SIZE(env->QRegs[n].uw); i++) {
 112         env->QRegs[n].uw[i] = ldtul_p(mem_buf);
 113         mem_buf += 4;
 114     }
 115     return MAX_VEC_SIZE_BYTES / 8;
 116 }
 117
 118 int hexagon_hvx_gdb_write_register(CPUHexagonState *env, uint8_t *mem_buf, int n)
 119 {
 120    if (n < NUM_VREGS) {
 121         return gdb_put_vreg(env, mem_buf, n);
 122     }
 123     n -= NUM_VREGS;
 124
 125     if (n < NUM_QREGS) {
 126         return gdb_put_qreg(env, mem_buf, n);
 127     }
 128
 129     g_assert_not_reached();
 130 }